Maximum payload

The absolute maximum payload size for an 802.15.4 packet is 116 bytes. Depending on module configuration, the actual maximum payload size will be reduced.

If you attempt to send an API packet with a larger payload than specified, the device responds with a Transmit Status frame (0x89 and 0x8B) with the Status field set to 74 (Data payload too large). When operating in transparent mode, if you attempt to send data larger than the maximum payload size, the data will be packetized and sent as multiple over-the-air transmissions. For more information, see Serial-to-RF packetization.